valve seals?

[tford]

I did a search. Stock motors don't have exhaust valve seals? Would this be the reason my car puffs a blue cloud on start up only? I never noticed it before until the wind blew the right way. I thought maybe the recent alky install screwed something up in the motor. Please educate me on this because if I tell the old school motor guys this I hang with, they won't believe me. I just want to make sure all is well before I hammer on this thing at the track this week. I don't need a tow bill right now. Motor has approx. 35k

 

[87GN_70GS]

Right, stock motors did not have exh seals. Sounds like your guides and/or int seals are worn.